Siemens SIMATIC NET PROFIBUS - Manual (Page 232)

Active Components for Optical Networks
8-4
PROFIBUS Networks SIMATIC NET
6GK1970-5CA20-0AA1 Release 2 05/2000
8.2 Optical Link Module OLM
Figure 8-2 Optical Link Module (OLM)
Uses
With the PROFIBUS OLM (Optical Link Module), Version 3, PROFIBUS networks
can be implemented as bus, star and redundant ring structures.
The transmission rate of a fiber-optic path is not dependent on the distance and
can range from 9.6 Kbps to 12 Mbps.
OLMs can be used in system buses based on PROFIBUS, inter-building networks
with glass fiber-optic cables, mixed networks with electrical and optical segments,
large-span networks (road tunnel, traffic control systems), networks in which high
availability is required (redundant ring networks) etc.